Dump car door control means



May 15, 1956 E. o. L UNDE 2,745,359

DUMP CAR DooR CONTROL. MEANS Filed Sept. 19, 1952 3 Sheets-Sheet l ATTOR/VEY May 15, 1956 E. o. LUNDE DUMP CAR DOOR CONTROL MEANS 3Sheets-Sheet 2 Filed Sept. 19, 1952 May 15, 1956 E. o. LUNDE DUMP CARDOOR CONTROL MEANS 3 Sheets-Sheet 5 Filed Sept. 19, 1952 INVENTOR.Ola/2d?. O l

Il ff ATTORNEY United States Patent() DUMP CAR DOOR CONTROL MEANS EinarO. Lunde, Wyckoff, N. J., assignor to Magor Car Corporation, New York,N. Y., a corporation of Delaware LApplication September 19, 1952, SerialNo. 310,447

4 Claims. (Cl. 10S-272) rIVhis invention relates to dump car doorcontrol means.

Thefinvention is more particularly concerned with a dump car wherein thebody thereof is supported on an underframe for tilting movement towardone side or the other thereof, and wherein one or more doors areprovided at each side of the body and pivotally connected theretoadjacent their lower ends, and a novel linkage disposed beneath the oorof the car body and operatively associated with the doors for permittingopening thereof upon tilting movement of the body.

It is a primaryobject of the invention to provide door control means ina dump car having a tiltable body wherein a door at each side of thebody is normally retained in closed position, and wherein, upon tiltingof the body toward one side or the other the corresponding door will bepermitted to open under the action of gravity.

A further object of the invention s to provide control means for doorsat the opposite sides of the tiltable body of a dump car which normallyprecludes opening of the doors, and which is operative upon tiltingmovement of the body to permit the door at the side of the body in thedirection of tilting movement to open while maintaining the door at theopposite side in closed position.

Other objects and advantages of the invention will become apparent inthe course of the following detailed description, taken in connectionwith the accompanying drawings, wherein:

Fig. l is a transverse section of the car body, with portions of thesupporting wheels in dot-and-dash lines and showing the door controlmeans in a normal position.

Fig. 2 is a transverse sectional view similar to Fig. 1 showing the carbody partially dumped and the door at the dumping side being partiallyopened.

Fig. 3 is a fragmental transverse sectional View corresponding toFigures 1 and 2 and showing the car body fully dumped and the door atthe dumping side fully opened.

Fig. 4 is a plan view showing the relative positions of the severalcomponents of the door control means at one end of the car.

Referring now in detail to the drawings, the body includes a oor 11 andopposite side doors 12 and 12a.

Brackets 13 and 13a are rigid with the body framing and depend from thebody floor 11. Fulcrum pins 14 and 14a are supported by the brackets 13and 13a and normally rest in bearings 15 and 15a which are rigidlymounted on the body holsters 16 and 16a.

The body is provided with opposite side skirts 17 and 17a which areslotted as indicated at 18 at the left of Fig. l for receiving the lowerends 19, 19a of door arms 20, 20a and said lower arm ends are pivotallyconnected to the body framing as at 21, 21a.

The arm ends 19, 19a are pivotally connected at 22, 22a to lengthwiseadjustable link assemblies 23, 24 and 23a and 24a and the linkassemblies are pivotally connected at their opposite ends as at 25, 25ato the adjacent ends of control arms 26, 26a which are pivotally mountedon pins 27, 27a, jointly with bell cranks 28, 28a and the icecontrolarms and bell cranks are normally inrcontact as indicated at 29 inFig. 1. The pins 27 and 27a are mounted on the brackets 13 and 13a.

The inner ends of bell cranks 28, 28a rotatably support rollers 30, 30aon pins 31, 31a and such rollers normally bear on the center sill 16b asindicated in Figures l, 2 and 3.

Door control arm'extensions 32, 32a have corresponding ends thereofloosely pivotally connected to the bell cranks 28, 28a, by the pins 31,31a and the control arm extensions are pivotally connected intermediatetheir ends on pins 33, 33a which are respectively supported by thebearings 15a and 15 in co-aXial relation to the fulcrum pins 14a and 14.

Control arm extension stops 34, 34a are supported in depending relationto the floor 11 and-the doors and skirts are provided with cooperatingstops 35, l36, 35a .and 36a.

Since the construction and action of the described link. age is the samewith each of the doors 12, 12a, the opera-l tion of the linkage will bedescribed in connection with the door 12 which is shown in Figures 2 and3 in the opening operation as is occasioned by tilting the body 10 tothe left in a dumping operation.

Upon reference to Figure l, it will be seen that in the normal positionof the body, the door 12 is securely restrained against opening for thefollowing reasons.

Any tendency of the door to open would cause counterclockwise rotationof the arm end 19 about the pvot 21 and which through link assembly 23,24 would tend to rotate the control arm 26 and bell crank 28 clockwiseabout their common pivot 27. In the normal position, however, the bellcrank 28 is restrained against clockwise rotation by the roller 30 whichis in contact with the center sill 1Gb.

Upon reference now to Figure 2 wherein the body 11) has been partiallydumped it will be observed :that the body is being rotated in acounter-clockwise direction about the axis of the fulcrum pin 14.

The counter-clockwise rotation tendency of the arm end 19 will now be afact since the elevation of pin 27 will permit the link assembly 23, 24and the control arm 26 with the bell crank 28 to assume an angularposition as shown.

At this point in the dumping operation, the roller 30 continues tocontact the sill 16h and continues so until stop 35 engages stop 36.

Upon continued rotation of the body, as in Figure, 3, the control arm 26and bell crank 28 will separate, thereby providing for a full floatingdoor.

Reverting to Figure 2, it will be observed that door 12a is maintainedin closed position during the above described opening of the door 12 bythe following means.

The door control arm extension 32a is pivotally mounted on pin 33a whichis concentric to fulcrum pin 14 and the free end of the arm extensionengages stop 34, and accordingly the extension is restrained against anyrotation during the body tilting, and thus will hold the bell crank 23a,door control arm 26a, the link assembly 24a, 23a, and the door 12a inimmovable position.

While I have disclosed the invention in accordance with a singlespecific structural embodiment thereof, such is to be considered asillustrative only, and not restric.

tive, the scope of the invention being defined in the subjoined claims.

What I claim and desire to secure by U. S. Letters Patent is:

1. In a dump car including a frame embodying a center sill, a bodysupported on the frame and having laterally opposed fulcrum pinsnormally engaged within open bearings on the frame for movement ofeither fulcrum pin upwardly from its bearing upon tilting of the bodyabout nected-,to thebodyt'a po-intintermediate the pin on said bellcranbandtheadjacent flcrtim pin, "'said. bellV crank adjacentbea'ringfaces Yab'o've their pivotalcofnnection "normally "in Contact, and an'adjustable link assemblypivotallyconectihg the opposite end of saidcontroPan-i ands'a'iddoorbelw lits' pivotal' connection l with the body.

v2.` The *structurev according fto *claim` l, wherein Vsaidb6dy`,isfproyiddfwith'afstop; adjacent each side thereof, the other fendof `said* extension' 'adapted to'engage Yone ofclsaidstopsbutbeing outofengagement therewith during s'aid'body dumping'about's'aid otherbearing, the corre- 4-siSo'nliigfzndof tlie ohrhexteisibnbeingfinn'g'agemt with the other of said stops during said body dumpingYabout said-otherbearing. Y v

3. The structure according to claim 1, wherein said `linkassemblyvcomprises a tubular member pivotally con-1 nected to theVcontrol arm and athreaded rod member pivotally connected to the *door*and having adjustable threaded connection with lthe interior "of thetubular member. Y c 4. The structurel according lto claim "l, whereinsaid body is provided withl a pairfoflaterallyspacedfdepend-y ingbrackets, to each of which 'ispivotally'connecte'd'the cooperating bellcrank and control arm associated'flw'ith one Ydoor and vwhich -carriesVthe fulcrum pin about which the body is til-table upon door controlVactuation of the bell crank and control arm.

References Cited in thedle of this patent i UNITED STATES PATENTS2,142,249 Miller Jan. 3,-'1'939 2,189,336 Anderson Feb. 6, 19402,199,545 Miller May 71940' 2,199,554 'Anderson Mayk 7,11940 2,463,395Kordish et al. Mar. 1, 1949y

